<template>

    <div class="app-container">

        <h2 style="text-align: center;">发布新课程</h2>

        <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
            <el-step title="填写课程基本信息" />
            <el-step title="创建课程大纲" />
            <el-step title="最终发布" />
        </el-steps>

        <el-button type="text" @click="openChapterDialog()">添加章节</el-button>

        <!-- 章节 -->
        <ul class="chanpterList">
            <li v-for="chapter in chapterVideoList" :key="chapter.id">
                <p>
                    {{ chapter.title }}

                    <span class="acts">
                        <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                        <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                        <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                    </span>
                </p>

                <!-- 视频 -->
                <ul class="chanpterList videoList">
                    <li v-for="video in chapter.children" :key="video.id">
                        <p>{{ video.title }}

                            <span class="acts">
                                <el-button type="text" @click="editVideo(video.id)">编辑</el-button>
                                <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                            </span>
                        </p>
                    </li>
                </ul>
            </li>
        </ul>
        <div>
            <el-button @click="previous">上一步</el-button>
            <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
        </div>

        <!-- 添加和修改章节表单 -->
        <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
            <el-form :model="chapter" label-width="120px">
                <el-form-item label="章节标题">
                    <el-input v-model="chapter.title" />
                </el-form-item>
                <el-form-item label="章节排序">
                    <el-input-number v-model="chapter.sort" :min="0" controls-position="right" />
                </el-form-item>
            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
            </div>
        </el-dialog>

        <!-- 添加和修改课时表单 -->
        <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
            <el-form :model="video" label-width="120px">
                <el-form-item label="课时标题">
                    <el-input v-model="video.title" />
                </el-form-item>
                <el-form-item label="课时排序">
                    <el-input-number v-model="video.sort" :min="0" controls-position="right" />
                </el-form-item>
                <el-form-item label="是否免费">
                    <el-radio-group v-model="video.free">
                        <el-radio :label="true">免费</el-radio>
                        <el-radio :label="false">默认</el-radio>
                    </el-radio-group>
                </el-form-item>

                <el-form-item label="上传视频">
                    <el-upload :on-success="handleVodUploadSuccess" :on-remove="handleVodRemove"
                        :before-remove="beforeVodRemove" :on-exceed="handleUploadExceed" :file-list="fileList"
                        :action="'http://localhost:8003' + '/eduvod/video/uploadAlyiVideo'" :limit="1"
                        class="upload-demo">
                        <el-button size="small" type="primary">上传视频</el-button>
                        <el-tooltip placement="right-end">
                            <div slot="content">最大支持1G，<br>
                                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
                            <i class="el-icon-question" />
                        </el-tooltip>
                    </el-upload>
                </el-form-item>

            </el-form>
            <div slot="footer" class="dialog-footer">
                <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveOrUpdateVideo">确 定</el-button>
            </div>
        </el-dialog>

    </div>
</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'

export default {
    data() {
        return {
            saveBtnDisabled: false,
            courseId: '',//课程id
            chapterVideoList: [],
            chapter: { //封装章节数据
                title: '',
                sort: 0
            },
            video: {
                title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                videoOriginalName: ''//视频名称
            },
            dialogChapterFormVisible: false,//章节弹框
            dialogVideoFormVisible: false, //小节弹框


            fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址
        }
    },
    created() {
        //获取路由的id值
        if (this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
            //根据课程id查询章节和小节
            this.getChapterVideo()
        }
    },
    methods: {
        //点击确定调用的方法
        handleVodRemove() {
            //调用接口的删除视频的方法
            video.deleteAliyunvod(this.video.videoSourceId)
                .then(response => {
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除视频成功!'
                    });
                    //把文件列表清空
                    this.fileList = []
                    //把video视频id和视频名称值清空
                    //上传视频id赋值
                    this.video.videoSourceId = ''
                    //上传视频名称赋值
                    this.video.videoOriginalName = ''
                })
        },
        //点击×调用这个方法
        beforeVodRemove(file, fileList) {
            return this.$confirm(`确定移除 ${file.name}？`);
        },
        //上传视频成功调用的方法
        handleVodUploadSuccess(response, file, fileList) {
            //上传视频id赋值
            this.video.videoSourceId = response.data.videoId
            //上传视频名称赋值
            this.video.videoOriginalName = file.name
        },
        handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },
        //==============================小节操作====================================
        //删除小节
        removeVideo(id) {
            this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                video.deleteVideo(id)
                    .then(response => {//删除成功
                        //提示信息
                        this.$message({
                            type: 'success',
                            message: '删除小节成功!'
                        });
                        //刷新页面
                        this.getChapterVideo()
                    })
            }) //点击取消，执行catch方法
        },
        //添加小节弹框的方法
        openVideo(chapterId) {
            //弹框
            this.dialogVideoFormVisible = true
            //清空
            this.video = {}
            this.fileList = []
            //设置章节id
            this.video.chapterId = chapterId

        },
        //添加小节
        addVideo() {
            //设置课程id
            this.video.courseId = this.courseId
            video.addVideo(this.video)
                .then(response => {
                    //关闭弹框
                    this.dialogVideoFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '添加小节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        saveOrUpdateVideo() {
            this.addVideo()
        },

        //==============================章节操作====================================
        //删除章节
        removeChapter(chapterId) {
            this.$confirm('此操作将删除章节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response => {//删除成功
                        //提示信息
                        this.$message({
                            type: 'success',
                            message: '删除成功!'
                        });
                        //刷新页面
                        this.getChapterVideo()
                    })
            }) //点击取消，执行catch方法
        },
        //修改章节弹框数据回显
        openEditChatper(chapterId) {
            //弹框
            this.dialogChapterFormVisible = true
            //调用接口
            chapter.getChapter(chapterId)
                .then(response => {
                    this.chapter = response.data.chapter
                })
        },
        //弹出添加章节页面
        openChapterDialog() {
            //弹框
            this.dialogChapterFormVisible = true
            //表单数据清空
            this.chapter.title = ''
            this.chapter.sort = 0
        },
        //添加章节
        addChapter() {
            //设置课程id到chapter对象里面
            this.chapter.courseId = this.courseId
            chapter.addChapter(this.chapter)
                .then(response => {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        //修改章节的方法
        updateChapter() {
            chapter.updateChapter(this.chapter)
                .then(response => {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '修改章节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        saveOrUpdate() {
            if (!this.chapter.id) {
                this.addChapter()
            } else {
                this.updateChapter()
            }
        },
        //根据课程id查询章节和小节
        getChapterVideo() {
            chapter.getAllChapterVideo(this.courseId)
                .then(response => {
                    this.chapterVideoList = response.data.allChapterVideo
                })
        },
        previous() {
            this.$router.push({ path: '/course/info/' + this.courseId })
        },
        next() {
            //跳转到第二步
            this.$router.push({ path: '/course/publish/' + this.courseId })
        },
        editVideo(videoId) {
            this.dialogVideoFormVisible = true
            video.getVideoInfoById(videoId).then(response => {
                this.video = response.data.item
            })
        },
        // updateDataVideo() {
        //     video.updateVideoInfoById(this.video).then(response => {
        //         this.$message({
        //             type: 'success',
        //             message: '修改成功!'
        //         })
        //         this.helpSaveVideo()
        //     })
        // },
    }
}
</script>
<style scoped>
.chanpterList {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}

.chanpterList li {
    position: relative;
}

.chanpterList p {
    float: left;
    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
}

.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList {
    padding-left: 50px;
}

.videoList p {
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
}
</style>